html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  color: #111827;
  background: #ffffff;
  line-height: 1.45;
}

header {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
  padding: 34px 22px 12px;
}

h1 {
  font-size: 48px;
  line-height: 1.05;
  margin: 0 0 8px;
  letter-spacing: -0.04em;
}

h2 {
  font-size: 28px;
  text-align: center;
  margin: 0 0 14px;
  line-height: 1.2;
}

h3 {
  font-size: 20px;
  text-align: center;
  margin: 22px 0 12px;
  line-height: 1.25;
}

section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 30px 22px;
}

p {
  font-size: 1rem;
  margin: 0 0 12px;
}

.authors {
  text-align: center;
  font-size: 1rem;
  line-height: 1.55;
  margin: 14px 0 8px;
}

.authors a {
  color: #111827;
  text-decoration: none;
}

.authors a:hover {
  text-decoration: underline;
}

.affiliations {
  text-align: center;
  font-size: 0.96rem;
  color: #4b5563;
  margin-bottom: 12px;
}

sup {
  vertical-align: super;
  font-size: 0.75em;
}

.buttons {
  margin-top: 12px;
}

.buttons a {
  display: inline-block;
  margin: 5px;
  padding: 9px 18px;
  background: #1f5a99;
  color: white;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 700;
}

.buttons a:hover {
  background: #143d68;
}

.side-nav {
  position: fixed;
  left: 24px;
  top: 150px;
  width: 150px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}

.side-nav a {
  color: #1f5a99;
  text-decoration: none;
  font-size: 0.94rem;
  padding: 6px 10px;
  border-left: 3px solid transparent;
}

.side-nav a:hover {
  background: #f0f5fa;
  border-left-color: #1f5a99;
  border-radius: 4px;
}

@media (max-width: 1280px) {
  .side-nav {
    display: none;
  }
}

.hero-section {
  padding-top: 18px;
}

.hero-summary {
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
  color: #374151;
}

.hero-summary span {
  margin: 0 7px;
}

.hero-caption,
.section-text {
  text-align: left;
  color: #4b5563;
  max-width: 900px;
  margin: 0 auto 22px;
  font-size: 1.04rem;
}

.section-subtitle {
  text-align: center;
  color: #4b5563;
  max-width: 900px;
  margin: 0 auto 22px;
  font-size: 1.04rem;
}

.figure-teaser {
  width: 92%;
  max-width: 1050px;
  display: block;
  margin: 18px auto 18px;
}

.figure-method {
  width: 80%;
  max-width: 960px;
  display: block;
  margin: 20px auto 10px;
}

.media-video {
  width: 86%;
  max-width: 980px;
  display: block;
  margin: 18px auto 10px;
  border-radius: 10px;
  box-shadow: 0 4px 18px rgba(15, 23, 42, 0.10);
  background: #f3f4f6;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
  align-items: start;
}

.video-card {
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  padding: 22px;
  background: #ffffff;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.05);
}

.video-card h3 {
  margin-top: 0;
}

.video-card video {
  width: 100%;
  display: block;
  border-radius: 12px;
  background: #f3f4f6;
}

.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 24px 0 18px;
  flex-wrap: wrap;
}

.gallery-btn {
  padding: 12px 26px;
  border: none;
  border-radius: 999px;
  background: #f1f4f8;
  color: #111827;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
}

.gallery-btn:hover {
  background: #dfeaf8;
  transform: translateY(-2px);
}

.gallery-btn.active {
  background: #1f5a99;
  color: #ffffff;
  box-shadow: 0 5px 14px rgba(31, 90, 153, 0.22);
}

pre {
  background: #f4f4f5;
  padding: 16px;
  border-radius: 10px;
  overflow-x: auto;
  font-size: 0.92rem;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

@media (max-width: 820px) {
  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 23px;
  }

  section {
    padding: 26px 16px;
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .figure-teaser,
  .figure-method,
  .media-video {
    width: 100%;
  }
}

.logo-imag{

  background:linear-gradient(
      90deg,
      #4D6DFF,
      #A048FF,
      #FF5A8B,
      #FF7A18
  );

  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;

  filter:drop-shadow(
      0 0 10px rgba(255,90,120,.25)
  );
}